NGK 4642 Spark Plug

Reliable Ignition with NGK Laser Platinum Spark Plug 4642

The NGK Laser Platinum Spark Plug 4642 is engineered to provide consistent ignition performance for select Chevrolet, Mitsubishi, and Suzuki vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Platinum center electrode tip for enhanced durability and stable ignition
• Copper core center electrode for improved conductivity
• Standard ground electrode design with nickel core material
• Non-removable nut electrical terminal type for secure connection
• Pre-gapped at .044 inches for optimal spark performance
• Flat seat type with 14mm thread diameter and 0.75-inch reach
• Hex size of 5/8 inch for standard installation tools
• Manufacturer heat range rating of 5 suitable for moderate engine temperatures

About the NGK Laser Platinum Spark Plug Line

The Laser Platinum Spark Plug line from NGK combines a platinum-tipped center electrode with a copper core to balance longevity and electrical efficiency. This design reduces electrode wear and maintains stable spark over time, making it suitable for vehicles requiring reliable secondary ignition components. The 4642 part number exemplifies this technology, providing consistent performance for compatible Chevrolet, Mitsubishi, and Suzuki models.

Technical Details and Compatibility

This spark plug features a single ground electrode with a nickel core, ensuring durability under typical operating conditions. The flat seat design and 14mm thread diameter match OEM specifications for a secure fit. With a pre-gap size of .044 inches and a heat range of 5, the NGK 4642 spark plug supports efficient combustion and helps maintain engine performance. Compatible vehicles include Chevrolet models as well as Mitsubishi and Suzuki vehicles such as the Diamante, Eclipse, Galant, Lancer, Mirage, Montero, Outlander, Tracker, Vitara, and XL-7.

Common Applications and Problem Solving

• Restores proper ignition in Chevrolet Eclipse and Mitsubishi Lancer engines
• Reduces misfires and rough idling in Suzuki Vitara and Outlander models
• Improves fuel efficiency by maintaining consistent spark delivery
• Addresses electrode wear issues in vehicles with extended spark plug service intervals
• Supports stable engine starting and acceleration performance

Installation Notes and Tips

Before installation, verify the spark plug gap is set to .044 inches as specified. Use a 5/8 inch socket for removal and installation to avoid damage to the hex. Apply anti-seize compound sparingly on the threads if recommended by the vehicle manufacturer. Torque the spark plug to the vehicle’s specifications to ensure proper sealing and performance. The non-removable nut terminal type requires compatible ignition wire connectors for secure attachment.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable ignition performance and durability. The Laser Platinum Spark Plug 4642 undergoes rigorous testing for heat resistance and electrical conductivity. While specific warranty details may vary, NGK products typically include coverage against manufacturing defects. Consult vehicle and product documentation for exact warranty terms.